Grain-separator.



No. 796,117. I PATVENTED AUG-1,1905.

- 3. DUNKBLBBRGER GRAIN SEPARATOR.

APPLICATION FILED JUNE 27,11903.

4 sums-51mm 1.

awe/who al fomuu y PATENTED AUG. 1, 1 905.

4 SHEETS-SHEET 2.

Sazraalflunkelbezger;

' S; DUNKELBERGER.

GRAIN SEPARATOR. APPLICATION FILED JUNE 27', 1903.

v I 'PATENTED AUG. 1, 1905. s. DUNKELBERGER. GRAIN SEPARATOR. APPLICATION FILED JUNE 27, 1903.

4 SHEETS-SHEBT 3 v.

elj womtoz 7 UNI E ST ES PATENT: OFFICE- SAMUEL DUNKELBERGER, OF NEWTON, KANSAS.

GRAIN-SEPARATOR.

T 0 all whom, it Wttty concern:

Be it known that I, SAMUEL DUNKELBER- GER, a citizen of the United States, residing at Newton, in the county of Harvey and State of Kansas, have invented a new and useful Grain-Separator, of which the following is a Specification.

This invention relates to mechanism for separating grain from straw after the same has passed through the cylinder and concave of a threshing-machine. Heretofore machines of this class which are in general use have been so constructed as to allow only a limited amount of very fine straw and chaff,

besides the grain, to pass through the sepagrain. Said grain is therefore carried out in large quantities with the straw, especially in fast threshing. On the other hand, if the separating devices were made coarse enough to allow full separation of the grain, fine straw, chaff, &c., from the straw the capacity of the shoe-sieves would be overtaxed, so as to cause great waste of grain, the fine elements being advanced in such large quantities by the grain conveyers and-chaffers as to incapacitate the blast from the fan from breaking such a heavy flow. The grain is therefore carried too far over or past the chaffers and sieves before separation and cleaning commences, this grain therefore being delivered into the return or tailings elevator in large quantities and being returned to the threshingcylinder to be mingled with the straw a second time. The consequence is that the amount of grain to be separated is greatly increased, and said returned grain being chaffless is cut or cracked'by the high-speed threshing-cylinder. A practically even and steady motion or speed in these machines is not attainable ,on account of the uneven feeding in wet and dry material, so that the speed is constantly rising and falling to a certain extent, requiring most skilful and careful management to accomplish good results. It may often occur,

Specification of Letters Patent. Application filed June 27, 903. Serial No. 163,376.

Patented Aug. 1, 1905.

therefore, that a heavy blast of air is operating upon a very light flow of grain, thus blowing practically the entire flow into the return elevating mechanism. It will therefore be understood that a machine if madeto separate will not clean properly and if made to thoroughly clean the grain will not separate properly.

The primary object of the present invention is toprovide a structure which will obviate these objections and to provide novel mechanism so associated with the separating and cleaning means that each is relieved of excessive work, with a consequent increase in the thoroughness with which their work is performed.

More particularly, one of the features of the invention resides in novel means of a simple nature for effecting a primary separation of thecoarse straw and the grain, fine straw, chaff, &c., this primary separation thus relieving the principal separating means of a considerable amount of work.

Another and very important feature relates to the means for separating the grain from the chaff and fine straw, this operation being ac complished by means which require comparatively low blasts of air, so that a very small proportion of the grain is ever carried into the return-elevator.

In the drawings forming a part of this application, Figure 1 is a side elevation of a preferred embodiment of the invention. Fig. 2 is a longitudinal sectional view through the same. Fig. 3 is a detail perspective view of the straw-agitating comb. Fig. 4: is a detail perspective view of a portion of the separatinggrate employed in connection with the separating-cylinder. Fig. 5 is a detail plan view of aportion of the ohaffer. Fig. 6 isaslightlymodified construction of grain separating mechanism. Fig. 7 is a sectional view through in Figs. 1 to 5, inclusive, it will be seen that a suitable casing 10 is employed, secured to a framework 11 andsupported upon wheels 12.

The front end of this casing is provided with the usual feed-chute 13, in rear of which is located the revoluble threshing-cylinder 14:, coacting with the concave 15, arranged below the same, said cylinder and concave having the usual teeth 16. In rear of the threshingcylinder and located slightly above the same is a separating-cylinder mounted on a shaft 17 and eomprisingheads 18, to which are attached cross-bars 19, carrying radial teeth 20. Located beneath this separating-cylinder is a concave grate 21, which extends to the concave 15 of the threshing-cylinder. The construction of this grate is illustrated in detail in Fig. 4:. It will be observed that spaced angle-irons are employed having narrow flanges 22 spaced apart and disposed concentrically to the shaft 17, thus forming a comparatively smooth surface over which the teeth 20 travel. The depending flanges 23 of the angle-irons are disposed radially with respect to the shaft 17 and through the same are passed tie-bolts 24, having thereon spacing-sleeves 25, located between the flanges,

and thus holding the angle-irons in proper relation. Secured to the upper faces of the flanges 22 are transversely-disposed bars 26, located longitudinally of the paths of movement of the teeth, these bars having their upper faces rounded, as shown. The grate 21 extends above the horizontal plane of the shaft 17, and at its upper end is located a rocker-shaft 27, carrying spaced serpentine fingers 28, extending rearwardly from the separating-cylinder and having their rear ends upturned. Between the fingers-28 are located a plurality of short fingers 29, having their free ends slightly offset, as illustrated. The rocker-shaft 27 and the fingers 28 and 29, carried thereby, constitute a straw-agitating comb, as is hereinafter described more fully. Located above the separating cylindeiy and preferably in the deck of the machine, is a fan-casing 30, having a discharge-throat 31, formed of hinged and therefore adjustable wind-boards 32, said boards being movable toward and from each other. Within the easing is mounted a revoluble fan 33 of any desired or well-known form. The blast from this fan can be directed over the separatingcylinder through the upwardly-moving teeth thereof and to the agitating-comb.

Located substantially midway between the top and bottom of the machine is the driving- Shaft 3 1, having pulleys 35, over which runs an endless raddle-belt 36, the upper sweep or stretch of said'belt extending upwardly at an inclination toward the'rear end of the ma' idlers 40 and thence back to the pulleys The front end of the raddle is located beneath the agitating-comb and below the upper edge of the separating-grate, and a deflector-board 41 extends from said edge downwardly, terminating in advance of the front end of the raddle and inclining in a slightly-rearward direction. This deflector stl is provided on its rear side with an oflset guide 12, extending over the front end of the raddle. A perforated floor 4:3 is located beneath the upper stretch of the raddle, and preferably extends the full length thereof, the perforation being sufiiciently large to permit the passage of grain, chafl, line straw, and the like. Revoluble agitator-cams 14 are located beneath the floor 43 and operate in openings 15, formed in the floor 13, so that said cams can contact with the raddle-belt, and thus agitate the same. An inclined return-platform a6 is located beneath the rear portion of the raddle and terminates at an intermediate portion of the same, this floor being located just beneath the lower or return portion of said raddle.

In the rear end of the machine and back of the raddle is a tail straw-rack. preferably constructed as follows: Hanger-links or stirrups 47 are hung, as shown at 18, in the rear end of the machine, and upon the lower ends thereof is supported an inclined rctin'n-board 19, overlapmng the rear end of the returni'loor 16, this support having a hinge connection, shown at 50, with a bracket 51, swung upon the rear hangers 4:7. Secured to this bracket are longitudimllly-disposed bars 52, upon which are fastened transverse-spaced rack-bars 53, thus forming a grating the front end of which is attached to a crank-shaft 54', journaled in the machine and arranged to give a vertical gyratory movement to the front end of the grate.

A longitudinally-reci1n'ocator grain pan or conveyor is located at the inclination beneath the threshing-cylinder and the forward end of the raddle, the rear end of the conveyor 55 being spaced a slight distance from the front end of the return-floor 16, thereby forming between the same a discharge-throat 567 The grain-conveyer is supported upon rocker-arms 57 and 58, the former being attached at their lower ends to a rocker-shaft 59, extending across the bottom of the machine. The rear end of the conveyer 55 carries spaced agitating-lingers 60, that extend into the throat 56 and have their free ends depressed, as shown.

Located beneath the discharge-throat 56 is the ad rance end of a clntlier-shoe 61, having a bottom 62-, that inclines toward the feed or front end of the machine, this shoe being supported upon swinging links 63. Arranged in the shoe and below the throat 56 is an adjustable chafler, the construction of which is illustrated in Figs. 2 and 5. Rake-heads 6% are journaled in the sides of the shoe and carry teeth 65, extending across the spaces between the heads. These heads carry depending arms 66, connected by a link 67, attached to the lower end of an adjusting-lever 68. i This adjustable chafier can thus be opened or closed, as maybe desired, the lever 68 being held by any suitable means. In rear of the chaffer "are aplurality of spaced notched boards or fish-backs 69, arranged within the shoe and terminating short of the rear end thereof, said rear end being provided with anupright wall 70.

The shoe 61 is connected with the main conveyer 55 through the medium of links 7 0, attached to said shoe and to the lower ends 71 of the arms 58, which ends depend below the pivotal support for the same.

A fan 72 is disposed in advance of the chaffer-shoe and is mounted upon a suitable shaft 73, extending across the lower portion of the machine, this fan being located within a casing 74, having a discharge-throat 75 leading to the chafi'er-shoe below the chaffer and within the same, so that the blast from the fan is directed not only through the chaffer,

but also through the space between the rear end portion of the grain-conveyer and said chaffer, also across the throat 56. The blast may be diverted or contracted, as desired, by

means of hinged adjustable wind-boards 76. Asecondary shoe 77 is located below the'chaf fer-shoe, being suspended by hanger-arms 78. This shoe has a return bottom 79, inclined v downwardly toward the front end of the machine and extending to the usual grain-auger of a link 84:, secured thereto and to the lower ends 71 of the arms 58. Another fan 85, fixed to a shaft 86, is mounted in a casing 87 in the lower portions of the machine and delivers a blast of air through the screen-shoe and also above the same. Above this fan is located a rearwardly and downwardly inclined deflector-board 88, arranged beneath the discharge end of the return-bottom 62 of thechaffershoe and having its discharge end disposed above the screen 81, being provided with separating-fingers 89.

While any desired mechanism may be employed for driving the various elements, means are illustrated in Figs. 1 and 2 which are considered preferable and which will now be described. The shaft 34ahas already been described as the driving-shaft. This shaft is provided on its opposite ends with cranks 90, to which are attached pitmen 91 and 92,

which are connected, respectively, with other crank-arms 93 and 94 of the rocker-shafts 27 and 59. It will thus be seen than an oscillatory movement is given the straw-agitating comb, whilethe grain-conveyer is longitudinally reciprocate d, thus imparting similar movements to the chaffer and screen shoes. It is-desired to'call attention to the particu lar arrangement of these shoes with respect to the conveyer 55. When said conveyer moves toward the front or feed end of the 98, constituting driving means for a belt 99,

that extends about a pulley 100, secured to the separating-cylinder shaft 17, a pulley 101, attached to the fan-shaft 86, and another pulley 102, fastened to the threshing-cylinder shaft. As a result of this arrangement of the belting the teeth 20 of the separating-cylin: der travel substantiallythe same number of feet per minute as the teeth 16 of the threshing-cylinder. The shaft of the threshingcylinder is belted, as shown at 105, to the shaft of the fan 33, and the agitatirigcams 44 and crank-shaft 54: are driven by belting 106 from the shaft 86 of the lower fan 85.

Referring now more particularly'to Fig. 2,

the-grain downwardly, the whole being rapidly advanced between the cylinder and grate, both being of large area. The grain is separated by the centrifugal force of the cylinder, which brushes the straw in a thin sheet over the grate, the grain flying through said grate and dropping onto the conveyer 55 along with considerable fine straw and chaff. The particular construction of the grate is very advantageous, as it will not become clogged, because of the fact that the lower portion is more open than the upper surface, the openings being contracted by the upper flanges 22 of the angle-irons. The rods 26, secured to the upper face of the grate, constitute tracks which will permit the straw to have a smooth unobstructed movement over the grate and will obviate any chance of its getting into the spaces between the angle-bars. The straw being carried over the separating-grate 21 is discharged in a direction toward the machine top or deck and at the same time is shot into the strong blast of air from the fan 33, which blast blows the straw rearwardly over the v agitating-comb, where it is thoroughly shaken from the machine.

a a ain by the fingers 28, the smaller particles passing through the fingers 29. This fan-blast also serves to clean the teeth of the separating-cylinder, so that no straw is carried continuously around with the same. The straw being thoroughly agitated and separated by the fingers, the lighter particles will become detached and are thrown rearwardly,

, dropping upon the board 49 will be returned to the bottom 46, the straw finally passing The grain, fine straw, chaff, and the like will gravitate down the re turn-platform 46 or be conveyed by the grainpan to the common throat 56 and thence drop upon the chafler. There is a break formed by the vertical distance between said chafler and throat, and a portion of the blast of air from the fan 7 2 is directed across this break. The material also is agitated by the tines 60 and is then thoroughly loosened, so that the lighter particles are driven over the chafler, while the heavier material passes therethrough. The fan-blast need not be very powerful, so that all danger of driving the grain through the machine is obviated. A goodly portion of the refuse is thus separated from the grain at this point, while the partially-cleaned material, gravitating down the return-bottom 62 of the chafler-shoe, will fall upon the oppositely-inclined deflector 88 and gravitate down the same through the fingers 89 and onto the cleaning-screen 81. In its drop from the deflector 88 to the screen it passes through a portion of the blast from the fan 85, while the remainder of said blast passes through the screen. The refuse still remaining in the screen is here removed, and the clean grain passing through the screen will gravitate down the bottom 79 into the grain-augur 80. The blast from the fan can be comparatively weak, as there is comparatively little refuse to be removed, and the stream of material is comparatively thin.

Thus very little grain will find its way into the return-elevator.

By this combination of elements not only is thorough separation obtained between the coarse straw, grain, chaff, &c., without overtaXing the separating mechanism, but the cleaning means will take care of any amount of grain threshed by a high-speed cylinder and will properly remove therefrom all refuse.

paratively simple and is compactly arranged, so that it occupies very little more space than the mechanism employed in the ordinary machine.

A slightly-modified form of grain-cleaner is illustrated in section in Fig. 6. The grainconveyer is therein designated by the reference-numeral 55, being supported at one end by a crank 57 and having its other end suspended by links 58, which are attached to brackets 107. To these brackets is secured the front end of a chafl'er 108, the rear end of which is supported by hanger-links 109. The rear end of the chafl'er also carries the fishback supports 110, which as in the former structure are preferably located above the tailings-screw 83. Suspended beneath the chafier is the cleaning-shoe 77, having a screen 81 and a rack 82, located above the tailings-screw. This shoe has a return-bottom 79, discharging into the grain-conveyer 80. The same deflector 88 is employed for delivering the material discharged from the chafl'er to the screen 81. A single fan 111 is employed in connection with the chafler and cleaning device, said fan being mounted within a casing 112, having a delivery-throat divided by an intermediate partition 113 into separate compartments 114 and 115, the compartment 114 delivering the air to the ehafler and also to the spaces between the grain-conveyer and the same. This delivery can be controlled by the usual deflecting or wind boards 116. The air discharging through the compartment 115 acts upon the screen in the manner already described. The amount of air discharging through the compartments can be controlled by a valve 117, located at the inner end of the partition 113. This structure can be arranged within an ordinary machine in connection with the usual strawseparating mechanism and maybe advantageous in this respect, though it has not the advantages of the particular construction shown and described in the first embodiment of the invention.

As an indication of how the separating mechanism may be modified without departing from the spirit of the invention, attention is invited to Figs. 7 and 8. In this instance the separating-cylinder comprises heads 118, one of which is secured, as shown at 119, to the shaft 120, the other head having an enlarged hub 121. Within this cylinder is located a fancasing 122, having a sleeve 123 extending through the hub 121 and fastened against rotation. The fan-casing has a discharge-opening 124 (shown in Fig. 7) and arranged to deliver a blast to the straw-separating comb 125. A fan 126 is located within the casing and is affixed to the shaft 120. The separating-grate employed in this instance is a concave perforated plate 127. (Shown in Figs.

7 and 9.) The action of this mechanism is The mechanism, moreover, is comsubstantially the same as that already described, for it will be apparent that the straw A still further modification is illustrated in Figs. 10 and 11. A cylinder (designated gen erally by the reference-numeral 128) is journaled upon a shaft 129, the end of this shaft projecting beyond the frame and carrying a fan 130, located within a casing 131. Extending from the casing is an air-conduit 132, leading over the cylinder and terminating in an elongated discharge {mouth 133, that is provided with boards 134, adjustable, as desired, to direct and contract the air-blast which passes over the cylinder to separate and clean the teeth.

From the foregoing it is thought that the construction, operation, and many advantages of the herein-described invention will be apparent to those skilled in the art without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the ad vantages of the invention. a

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a grain-separator, the combination with a threshing-cylinder, of a concave coacting therewith, a separating-cylinder of greater diameter than the threshing-cylinder, said separating-cylinder being disposed in rear ofv and above the threshing-cylinder, and a concave grate located beneath the separating-cylinder and having a downwardly-inclined front portion extending from the concave, said grate comprising transversely-dis- .posed angle-bars, the upper side faces of the upper flanges of said bars constituting the base of the grate, the other flanges being disposed in depending relation, and tie-bolts passing through the flanges.

2. In a grain-separator, a separating-grate formed of spaced angle-bars, certain of the flangesof said bars constituting the face of .said grate, tie-bolts passing through the other .flanges, and sleeves located on the bolts between the flanges to space the bars, said sleeves being of greater length than the width of said face-flanges.

3. In a grain-separator, a separating-grate comprising transverse spaced angle-bars certain flanges of which constitute one face of the constituting the face of the grate, tie-bolts passing through the other flanges, sleeves lo-i cated on the bolts for spacing the bars, and longitudinally-disposed bars located upon the transverse bars and spaced apart, said bars having convexed upper faces.

5. In a grain-separator, the combination with the threshing cylinder and concave, of a separating-cylinder located in rear of the threshing-cylind er, a concave grate extending beneath the separating-cylinder, a straw-carrier located in'rear of the grate, and a fan for discharging a blast of air to carry the material rearwardly from the concave grate to the straw-carrier. V

6. In a grain-separator, the combination with a threshing cylinder and concave, of a separating cylinder located in rear of the threshing-cylinder, a separating-grate located beneath the separating-cylinder and extending in rear of the same, a fan located above the separating-cylinder, and means for directing the blast of air from the fan across said cylinder and the space between'the same and the rear end of the grate to carry the "straw from the discharge end of the grate.

7. In a grain-separator, the combination with a threshing cylinder and concave,of a separating cylinder located in rear of the, threshing-cylinderand of greater diameter than the same, a separating-grate extending from the threshing-concave beneath the separating-cylinder and in rear of the same, an endless raddle having one end located beneath the rear end of the'separating-cylinder, a fan, and meansfordirecting the blast of air from the fan across thecylinder over the rear end of the separating-grate.

8, In a grain-separator, the combination with the threshing cylinder and concave, of a concave grate located in rear of and having its lower portion higher than the threshingconcave, a separating-cylinder of greater diameter than thethreshing-cylinder arranged over the concave grate and coacting therewith, a straw-carrier in rear of the grate, and oscillating fingers extending from the upper end of the grate over the carrier.

n 9. In a grain-separator, the combination with the threshing cylinder and concave, of a concave grate located in rear of and having its lower portion higher than the threshingconcave, a separating-cylinder coacting with the concave grate, a straw-carrier disposed in rear of the grate, a rock-shaft mounted on the rear end of the concavegrate, and reversely-curved rearwardly-extending fingers secured to the rock-shaft and disposed over the straw-carrier.

10. In agrain-separator, the combination with threshing mechanism, of primary separating mechanism'located in rear of the same, a straw-carrier arranged in rear of the primary separating mechanism and below the same, arock-shaft arranged between the pria straw-carrier arranged in rear of the primary separating mechanism, a rock-shaft arranged between the primary separating mechanism and straw-carrier, and serpentine fingers carried by the rock-shaft and extending over the carrier.

12. In a grain-separator. the combination with threshing mechanism, of a separatingcylinder, a straw-carrier, an agitator located between the separating-cylinder and the carrier, and means for directing a blast of air from the cylinder across the agitator and toward the carrier.

13. In a grain-separator, the combination with threshing mechanism, of a separatingcylinder and grate coactingtherewith, a strawearrier located in rear of the separating-cylinder and grate, an agitator disposed above the straw-carrier, and a fan located above the separating-cylinder for directing a blast of air across the same, across the agitator and toward the carrier.

14. In a grain-separator, the combination with a threshing cylinder and concave, of a separating-cylinder of greater diameter than the threshing-cylinder and located in rear of the same, a concave separating-grate extending from the threshing-concave beneath the separating-cylinder and in rear of the same, an endless straw-carrier extending beneath the rear end of the grate, oscillatory agitating-fingers extending from the rear end of the grate over the carrier, and a fan located above the separating-cylinder and directing a blast of air rearwardly through the fingers and toward the straw-carrier.

15. In a grain-separator, the combination with threshing mechanism, of a revolnble separatingcylinder located in rear of the threshing mechanism, a concave grate extending beneath and in rear of the separating-cylinder, an endless straw-carrier located in rear of the grate and beneath the rear end of the same, and a depending deflectorboard extending from the rear end of the grate to the front end of the straw-carrier and having an intermediateotfset guide-plate ex tending rearwardly over the carrier.

16. In a grain-separator, the combination with threshing mechanism, of a revoluble separating-cylinder located in rear of the threshing mechanism, a concave grate extending beneath and in rear of the separating-cylinder, an endless straw-carrier located in rear of the grate and having its front end located beneath the rear end thereof, a downwardly and rearwardly inclined deflector extending from the rear end of the grate to the front end of the straw-carrier, and an agitatorcomb located at the upper end of the deflector and the rear end of the grate.

17. Ina grain-separator, the combination with a straw-carrier, of an agitator-rack located in rear of the carrier and receiving the material therefrom, said carrier being supported at its rear end independently of the rack, means for swingingly supporting the rear end of the rack, means for imparting a vertical gyratory motion to the front end of said rack, and a longitudinally-reciprocating downwardly-inclined return-board disposed beneath the rack.

18. In a grain-separator, the combination with an upwardly-inclined straw-carrier, of a forwardly and downwardly inclined returnfloor located beneath the carrier, an agitatorrack located in rear of the carrier and receiving material therefrom, means for swingingly supporting the rear end of the rack, means for imparting a vertical gyratory motion to the front end of said rack, and a longitudinally-reciproeating downwardly-inclincd return-board disposed beneath the rack and delivering to the rear end of the return-floor.

19. In a grain-separator, the combination with a straw-carrier, of swinging links located in rear of the carrier, a downmtrdly and forwardly inclined return-board attached to the links, an agitator-rack hinged to the rear end of the return-board, and means for imparting a gyratory movement to the rack.

v2O. In a grain-separator, the combination with an endless straw-carrier, of a downwardly and forwardly inclined return lioor located beneath the carrier, links hung in rear of the carrier, a doumwardly and forwardly inclined return-board supported by the links and having its front end overlapping the rear end of the return-floor,an agitator-rack hinged at its rear end to the rear end of the returnboard, and a crank-shaft connected to the free end of the agitator for delivering a vertical gyratory movement thereto.

21. In a grain-separator, the combination with threshing mechanism, of a stun -carrier, a ,chafler-shoe having a screen and a forwardly and downwardly inclined bottom, means for directing the material separated from the straw to said chafier-shoe, a cleanershoe disposed below the chafier-shoc, a rearwardly and downwardly inclined deflectorboard disposed beneath the front end of the chafler-shoe and extending over the front portion of the cleaner-shoe, rearwardly-projecting separating lingers carried by the lower end of the deflector-board and extending over the cleaner -shoe, and means for directing blasts of air over and through said shoes.

22. In a grain-separator, the combination with a threshing cylinder and concave, of a straw-carrier located in rear of the same, a return-floor arranged beneath the rear portion of the straw-c:n'rier, said Iloor inclining forwardly and downwardly, an upwardly and rearwardly inclined grain-pan extending beneath the threshing-cylinder and the front portion of the straw-carrier, said grain-pan being substantially alined with and spaced" from the return-floor forming a throat, agitator-tines carried by the rear end of the grain-pan and extending partially across the throat, a forwardly and downwardly inclined chafler-screen having a portion disposed beneath the throat, a forwardly and downwardly inclined cleaner-screen suspended beneath the chaifer-screen, and means for directing blasts of air over the screens and across the said throat.

23. In a grain-separator, the combination with threshing mechanism, of a separatingcylinder located in rear of the same, a concave grate disposed beneath and extending in rear of the separating-cylinder, an endless strawcarrier located in rear of the cylinder, an oscillatory agitating-comb arranged at the rear end of the grate, a fan for directing a blast of air across the separating-cylinder, the comb, and to the carrier, a grain-conveyer located beneath the threshing-cylinder,

separating-grate and the front portion of the straw-carrier, a downwardly and forwardly inclined return floor disposed beneath the rear portion of the carrier and having its front end spaced from the rear end of the grain-conveyer forming a throat, a chaffer supported beneath the throat, means for directing a blast of air through the chaifer, independently supported grain cleaning means located beneath the chafl'er, means for directing the material that passes through the chaffer to the grain-cleaner, and means for directing the blast of air through the grain-cleaner.

In testimony that I claim the foregoing as my own I have hereto afiEiXed my signature in the presence of two witnesses.

SAMUEL DUNKELBERGER. Witnesses:

JOHN H. LINN, EMIL L. RUTH. 

